O’Toole joined PJA 12 years ago and had been evp, partner, playing a key role in building the shop into one of New England’s most successful business-to-business players. Among his accomplishments, he helped guide PJA’s successful expansion into San Francisco and oversaw the agency’s acquisition of interactive capabilities.

Said Johnson: “PJA has committed to an aggressive plan to increase our national presence. Mike O’Toole provides the leadership we need to achieve those goals.”

Last month, the agency added Infor, a software firm in Alpharetta, Ga., that specializes in enterprise asset management, planning and supply-chain products. Though it has kept a low profile, the client generates $2.2 billion in annual revenue and ranks among the world’s largest applications providers.